MAX8582 Maxim Integrated Products, MAX8582 Datasheet
MAX8582
Manufacturer Part Number
MAX8582
Description
(MAX8581 / MAX8582) Step-Down Converters
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX8582.pdf
(9 pages)
The MAX8581/MAX8582 high-frequency step-down con-
verters are optimized for dynamically powering the power
amplifier (PA) in CDMA handsets. They integrate a high-
efficiency PWM step-down converter for medium- and
low-power transmission and a 60mΩ (typ) bypass mode
to power the PA directly from the battery during high-
power transmission. They use an analog input driven by
an external DAC to control the output voltage linearly for
continuous PA power adjustment. The MAX8581/
MAX8582 use an internal feedback network, and the
switching frequency is internally set to 2.5MHz and
1.5MHz, respectively.
Fast switching (up to 2.5MHz) and fast soft-start allow
the use of ceramic 2.2µF input and output capacitors
while maintaining low voltage ripple. The small 1.5µH to
3.3µH inductor size can be optimized for efficiency.
The MAX8581/MAX8582 are available in 10-pin, 3mm x
3mm TDFN packages (0.8mm max height).
19-0593; Rev 0; 11/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
with 60mΩ Bypass in TDFN for CDMA PA Power
2.2μF
Li+ BATTERY
WCDMA/NCDMA Cell Phones
Wireless PDAs, Smartphones
CONTROL
INPUT
ANALOG
ON/OFF
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
GND
SHDN
REFIN
2.5MHz/1.5MHz Step-Down Converters
MAX8581
MAX8582
General Description
OUT
LX
HP
Applications
1.5μH OR 3.3μH
FORCED BYPASS
0.4V TO V
OUTPUT
BATT
2.2μF
♦ 600mA Step-Down Converter
♦ 60mΩ (typ) Bypass Mode with Integrated FET
♦ Dynamically Adjustable Output from 0.4V to V
♦ 2.5MHz and 1.5MHz Switching Frequency
♦ Small LC Components: 1.5µH to 3.3µH and 2.2µF
♦ Up to 94% Efficiency
♦ Low Output Ripple at All Loads
♦ 2.7V to 5.5V Input
♦ 0.1µA Shutdown Mode
♦ Output Short-Circuit Protection
♦ Thermal Shutdown
♦ 10-Pin, 3mm x 3mm TDFN Packag
*All devices are specified in the -40°C to +85°C extended
**EP = Exposed pad.
+Denotes lead-free package.
temperature range.
MAX8581ETB+
MAX8582ETB+
PART*
TOP VIEW
+
10
1
10 TDFN-EP**
10 TDFN-EP**
PIN-
PACKAGE
Ordering Information
9
2
MAX8581/
MAX8582
8
3
Pin Configuration
7
4
6
5
MARK
TOP
ACU
ACT
Features
T1033-1
T1033-1
CODE
PKG
IN
1
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